Response schema but not an entry type?

[mbaudis]

For some responses one could envision the use of alternative schemas which do not represent an entry type and/or have an id. A practical example here would be the export of biosamples after a biosample query in the phenopackets format.

What would be the options for such an alternative schema use, e.g. optionally just referencing the (local or external) phenopackets schema? Obv. one can define a complete /phenopackets entry type & model - but this is a bit complex for mostly just changing the response format when not having a very different response type.

Comments, please!